threadgroup

ThreadGroup類的toString()方法 (ThreadGroup Class toString() method)

• toString() method is available in java.lang package.

  toString()方法在java.lang包中可用。

• toString() method is used to returns string denotation of this thread group (i.e. this method returns how to represent a string of this ThreadGroup).

  toString()方法用于返回該線程組的字符串符號(即，該方法返回如何表示此ThreadGroup的字符串)。

• toString() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  toString()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• toString() method may throw an exception at the time of string denotation of this ThreadGroup.

  在此ThreadGroup的字符串表示形式時， toString()方法可能會引發異常。

  SecurityException – This exception may throw when the current thread is not permitted to update this Thread group.

  SecurityException-當不允許當前線程更新此Thread組時，可能引發此異常。

Syntax:

句法：

    public String toString();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of this method is String – it denotes string of this thread group.

該方法的返回類型為String –表示該線程組的字符串。

Example:

例：

// Java program to demonstrate the example 
// of String toString() method of ThreadGroup 
public class toString {
public static void main(String[] args) {
ThreadGroup th_grp1 = new ThreadGroup("th_grp - 1");
ThreadGroup th_grp2 = new ThreadGroup("th_grp - 2");
// By using getName() method is to display
// thread group name
System.out.println("th_grp1.getName(): " + th_grp1.getName());
System.out.println("th_grp2.getName(): " + th_grp2.getName());
// By using toString() method is to string
// representation of thread group 
System.out.println("th_grp1.toString(): " + th_grp1.toString());
System.out.println("th_grp2.toString(): " + th_grp2.toString());
}
}

Output

輸出量

th_grp1.getName(): th_grp - 1
th_grp2.getName(): th_grp - 2
th_grp1.toString(): java.lang.ThreadGroup[name=th_grp - 1,maxpri=10]
th_grp2.toString(): java.lang.ThreadGroup[name=th_grp - 2,maxpri=10]

翻譯自: https://www.includehelp.com/java/threadgroup-tostring-method-with-example.aspx

threadgroup